He (Jesus) shall bruise your head; this is a reference to the Cross. Jesus’ death bruised Satan’s head, authority, power, and ruling control at the Cross. Satan’s minion bruised Jesus’ heal, the actually crucifixion. Head, heel; who do you think won? Hint: empty tomb three days later.
On Genesis 315 we are going to go deep into Salvation, Redemption, & Justification by Faith which are the work of the Crucifixion of Jesus Christ. There are other doctrines and they all fall into what is called the Finished Work of the Cross. It is call the Finished Work because Jesus is seated at the Right Hand of God the Father and when you are finish your job/work you ‘SIT DOWN’.